The lcd screen is almost black/ very dark, but i still see that it works. it looks like the light is out. sony hdr hc1

This is a fault in the electronic aperture control and will probably cost you $800 if you have it repaired by Sony. However, There are many qualified independent repair shops that will do the repair at a discounted price.

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http://www.eserviceinfo.com/download.php?fileid=42561
You will need to download all 6 parts and then extract the files.

This happens when flexible wire between LCD board and camcorder board got broken or cracked.
Camcorder needs that connecting flexible wire replacement, let me know exact model of Sony camcorder if you need part number of flexible wire.
Thanks.

MECHANIZAM fauly.repalace it by expert.

touchscreen problem on the HDR-HC1 is usually caused by a broken flex cable. service manual is a must-have; it illustrates the correct disassembly and replacement procedures for the cables.

this is some problem with the internal software or hardware. nohting to do with externals. check it out by doing a hard reset.

What if there's no tape inside of the camera, does it still same?

Me too! The camera was working perfectly until yesterday and when I turned it on today, it selectively ignores some buttons on the screen - and pressing the "Menu" gives me nothing. I've tried to reset it through that pin hole button, but it just resets the machine back to its default.